code: def _fix_header(filename):
      with open(filename, "rb") as f:
          data = f.read()
      if not data.startswith(b"#pragma once\n"):
          with open(filename, "wb") as f:
              f.write(b"#pragma once\n\n")
              f.write(data)
  
file_path: catboost/catboost/jvm-packages/catboost4j-prediction/src/native_impl/regenerate_jni.py
imports: from __future__ import absolute_import, print_function
  import distutils.spawn
  import os
  import subprocess
  import sys
label_desc: Use image node_id 5 for calling a global function with example usage: _fix_header(filename) without return types